I'm a sucker for bowling games. Always have been. (It's part of the reason I've kept the Zune HD around for so long.) This week I've been playing 10-Pin Shuffle, which as the name implies is a shuffle-bowling game. The app itself is free, but it's limited to just one poker-style game until you cough up a few bucks via an in-app purchase.
Game play is simple enough -- flick the puck forward. It's also plenty smooth, and the graphics are decent. Not great, but good enough for some quick play. Give the free version a shot before paying, though, and see if this one's up your ally.